Round: 27 Ground: Hardcourt outdoor
| ITF - M15 Tsukuba - Doubles Hommes | 2019/03/27 04:40 | Nishiwaki K / Ogura K v Ishigure M / Tagata R | 3-6,5-7 |
| ITF - M15 Tsukuba - Doubles Hommes | 2019/03/27 05:10 | Lee/Wang v Hazawa S / Niki T | 4-6,3-6 |
| Kofu, Doubles M-ITF-JPN-03A | 2019/03/22 05:30 | Ehara H / Katayama S v Hazawa S / Niki T | 6-4,6-4 |
| Kofu, Doubles M-ITF-JPN-03A | 2019/03/21 09:15 | Ito Y / Mochizuki Y v Hazawa S / Niki T | 4-6,2-6 |
| Kofu, Doubles M-ITF-JPN-03A | 2019/03/19 06:10 | Ichikawa T / Tajima N v Hazawa S / Niki T | 2-6,3-6 |